CN108350766A - The cut off device arm of engine distributor - Google Patents
The cut off device arm of engine distributor Download PDFInfo
- Publication number
- CN108350766A CN108350766A CN201680062764.0A CN201680062764A CN108350766A CN 108350766 A CN108350766 A CN 108350766A CN 201680062764 A CN201680062764 A CN 201680062764A CN 108350766 A CN108350766 A CN 108350766A
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- Prior art keywords
- cut
- device arm
- arm
- axis
- valve
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- 230000003213 activating effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
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- 230000005540 biological transmission Effects 0.000 description 2
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
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- 229910052799 carbon Inorganic materials 0.000 description 1
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- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L1/185—Overhead end-pivot rocking arms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L2001/187—Clips, e.g. for retaining rocker arm on pivot
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Present aspect is related to a kind of cut off device arm (20) of the device (10) of the valve in the cylinder cover by means of camshaft to activate the Thermal Motor of motor vehicles, in the cylinder cover of the engine, the cut off device arm includes the cam shaft arrangement：Actuator arm (23), the actuator arm can surround pivot axis (22) and pivot；And contact head (24), the contact head extend from the first end of the arm and are arranged between the cam and valve of the camshaft.It is a feature of the present invention that the contact head includes the bottom surface (26) towards the valve, the bottom surface is substantially in convex surface and has the curvature (27) of the axis variation along the actuator arm (23).
Description
Technical field
The present invention relates to a kind of Thermal Motor of motor vehicles or the distributors of internal combustion engine.
The present invention relates more specifically to a kind of device being activated valve by means of camshaft.
The present invention relates more specifically to a kind of cut off device arm, and the cut off device arm is a part for valve actuating apparatus.
Background technology
In the motor vehicles with internal combustion engine or Thermal Motor, distributor is installed, with allow air or
Live gas enters in the chamber of engine cylinder, and burnt gas is discharged after then being burnt in the chamber.Point
With device include can in the cylinder cover of Thermal Motor translational movement valve.Valve is mechanical component, it is used for Thermal Motor
Distribution and allow the entrance of live gas and the discharge of burnt gas.Therefore, it is poor to exist between intake valve and air bleeding valve
Not, the intake valve detaches admission line with combustion chamber, and the air bleeding valve detaches the combustion chamber with discharge duct.Machine
The valve used in the engine of motor-car is usually poppet or funnel type valve, one by this valve includes the valve head by widening
Hold the valve rod extended, the valve head widened that can block the pipeline tapping opened in a combustion chamber.
Valve is generally activated by camshaft, which can push the valve rod of valve according to the axis of the valve rod.For this purpose,
The cam of the free end of the adjacent valve rod of camshaft carrying so that the axis surrounds the axis rotation for being substantially normal to valve rod axis
Turn.Therefore valve rod free end by cam towards cylinder combustion chamber push (cam be fixed to camshaft so as to rotatably
It is fixed), to permit opening the discharge duct or discharge tube of admission line or burnt gas for fresh air.This is
Because valve rod slides in cylinder cover towards combustion chamber, to open the discharge duct of air intake pipe or burnt gas
Opening.Then, valve return by (or multiple) return spring.
The free end of valve rod usually have smaller cross-sectional area, and the contact between cam and valve rod may in
It is disconnected, so as to cause Thermal Motor to break down.
It is known for example to increase the contact cross section by adding contact cylinder to the free end of valve rod, the contact cylinder
It is fixedly joined to valve rod and makes the contact between valve rod and cam more reliable.
It it is known that contact cut off device arm and be placed in and ensure that the actuating movement of cam is transferred to valve between cam and valve rod
The free end of bar.The cut off device arm generally comprises the arm that can surround the axis moving in rotation perpendicular to valve rod mobile axis, with
And the cut off device arm head at valve rod free end can be abutted.Cam is during its moving in rotation against one of the arm of cut off device arm
Point, cause the displacement of cut off device arm head will pass through translation, therefore cause the displacement of valve stem end.
In order on the one hand so that the contact between cam and cut off device arm is more reliable and on the other hand so that partition
Contact between device arm and valve rod is more reliable, arranges return spring on cut off device arm and valve respectively.The inclination of cut off device arm moves
This is controlled reason by cam, to allow valve to be slided towards its open position, to open the opening of air or gas pipeline, each
The closure of valve is controlled by the return spring of valve.
The return spring of valve is related to valve technology, and the present invention is not related to the field.
Return spring on cut off device arm may make the assembly of distributor more complicated.
In the prior art, a large amount of trials have been carried out to reduce the phenomenon that valve interrupts.
This is because the interruption of valves known can limit the maximum engine speed of engine, that is, the performance water of engine
It is flat, and mechanical deterioration can be caused, such as make piston and valve impaired.
It is as follows to limit the known solution that valve interrupts：
Mitigate the removable quality (for example, using titanium valve, aluminium cup) of valve,
The stringency (being wrenched for example, reducing acceleration or reducing) for promoting rule is reduced,
Increase intrinsic dividing frequency,
Increase the return load (for example, dual spring) of spring,
The different solution of combination.
However, these known solutions can cause, the removable quality of valve increases and distribution increases, to influence to send out
Cost, space requirement and the performance level of motivation.
Announce FR2861130-A1 disclose a kind of cylindrical member, the cylindrical member be arranged in the end of valve rod so that
The contact obtained between the valve rod and cut off device arm is more reliable, and the cut off device arm can surround the axis perpendicular to the valve rod axis
Line inclination movement.The other quality of valve stem end leads to the dynamic operation reduction of valve and engine performance declines.
It announces FR2733539-A1 and discloses a kind of cut off device arm, the cut off device arm can surround the cunning perpendicular to valve rod
It the axis pivot movement of dynamic/translated axis line and is arranged between cam and valve stem end.The cut off device arm includes that elasticity is returned
For position device to ensure the contact between cut off device arm and cam, this so that the device for activating valve is more complicated.
In order to ensure the optimum operation of engine, it is necessary to monitor the sliding of valve, and must ensure on the one hand cam with
Contact between cut off device arm ensures the contact between cut off device arm and valve rod on the other hand simultaneously.
In order to ensure the operating reliability of engine, valve is made to enclose to rotate about the axis thereof and be advantageous.In the text of the prior art
Cut off device arm described in shelves does not suggest any mode that valve may be made to rotate.
It is an object of the present invention to overcome the problems, such as these, and one of subject of the present invention is arranged on the heating power of motor vehicles
The distribution cut off device arm of valve actuating apparatus in the cylinder cover of engine, described device allow to be arranged between valve rod and cam
The distribution cut off device arm is bonded in smaller space, the cam be fixed to camshaft rotatably to fix, cut off device arm
Valve can be caused to rotate.
Invention content
The present invention relates more specifically to a kind of convex in the cylinder cover of the Thermal Motor of motor vehicles by means of being arranged in
Wheel shaft activates the cut off device arm of the device of valve；
The cut off device arm includes：Actuator arm, the actuator arm can surround the pivot for the axis for being arranged essentially parallel to camshaft
Shaft axis is pivotally displaced；And contact head, the contact head are arranged in the first end of actuator arm and between cam and valves,
The cut off device arm is characterized in that contact head includes the bottom surface towards valve, and the bottom surface is substantially in convex surface, packet
Include the curvature changed around the axis of actuator arm.
Advantageously, the bottom surface towards valve rod of the contact head of cut off device arm is convex surface, that is to say, that it is directed toward cam, with
Just the contact between the cut off device arm and valve rod is kept during cut off device upper-arm circumference is pivoted around pivot axis.This is because cam
The cam of axis includes the part for the contact head for abutting against cut off device arm, and the part causes the cut off device upper-arm circumference around pivot
Axis pivots.This adjoining the result is that in sliding manner by valve rod towards engine cylinder combustion chamber push, thus by institute
Valve rod is stated to remove from cut off device arm.Convex bottom surface (the wherein described curvature changes according to the axis of actuator arm) including curvature is therefore
Allow to compensate the relative movement between the bottom surface of contact head and the head of valve rod of cut off device arm, and therefore allows keeping separating
With the sliding of valve rod while contact between the contact head of device and the valve rod.
Other features according to the present invention：
The bottom surface of the contact head of cut off device arm includes essentially around the axis parallel with the pivot axis of cut off device arm
First curvature.
Advantageously, the bottom surface of the contact head of cut off device arm includes essentially around the pivot axis for being parallel to cut off device arm
The first curvature of axis, during cut off device upper-arm circumference pivots about axis pivot, to keep between valve rod and cut off device arm
With the sliding of valve rod while contact.
The bottom surface of the contact head of cut off device arm includes surrounding axis substantially parallel with the axis of the actuator arm of cut off device arm
The torsion of line.
Advantageously, the bottom surface of the contact head of cut off device arm includes surrounding substantially to put down with the axis of the actuator arm of cut off device arm
The torsion of capable axis, the curvature can on the direction of the axis of valve to the valve applied force, thus when
Cam, which is moved to the when of abutting against cut off device arm and valve rod, to be caused the valve rod and valve to enclose to rotate about the axis thereof, to open lead to
The gas pipeline of cylinder chamber.
Therefore, cam abuts against cut off device arm to make valve generate sliding action, to which cylinder chamber is led in release
Gas pipeline opening, the sliding action with valve surround its axis rotation.
The contact head of cut off device arm includes the top surface of cam opposite and towards camshaft, and the top surface is concave surface
And there is single curvature.
Advantageously, the contact head of cut off device arm includes the cam towards camshaft and the top surface for concave surface, top surface tool
There is single curvature to be moved during rotation with the adjacent of the cam.This is because cam moves during its moving in rotation
To top surface is abutted against, this causes the contact between cam and the top surface of cut off device arm to generate sliding action and may make two
A element separation.That is, two elements can be kept in the best way during cam rotates by being directed toward the concave top surface of valve
Between contact.
The curvature of top surface is consistent with axis substantially parallel with the axis that cut off device arm pivots.
Advantageously, the curvature of concave top surface is consistent with the axis for the pivot axis for being arranged essentially parallel to cut off device arm, so as to
Keep the contact between cam and the top surface of cut off device arm, the pivot of cut off device arm in the best way during cam rotates
Axis is arranged essentially parallel to the rotation axis of cam.
The top surface of the contact head of cut off device arm is covered by the sliding material with low-friction coefficient.
Advantageously, the top surface of the contact head of cut off device arm is covered by the sliding material with low-friction coefficient, to allow
Cam is easy to slide in the whole surface of the top surface of cut off device arm, and is reduced during its relative shift relative to each other
It rubs between two elements；The generation of the friction can cause engine undesirably excessively to use.
The top surface of the contact head of cut off device arm includes the width consistent with the pivot axis of cut off device arm, this is of different size
In the width of the cam of camshaft.
Advantageously, the top surface of the contact head of cut off device arm includes the width consistent with the pivot axis of cut off device arm, the width
Degree different from the cam of camshaft width, so that ensure between the cam and the top surface substantially permanent contacts.
Cut off device arm includes the engagement ring being fixed at the second opposed end of actuator arm, and the ring can be by means of connecing
Tactile surface surrounds pivot axis.
Advantageously, cut off device arm includes so that actuator arm is extended to first end in the second opposed end by contact head
Engage ring；The ring can surround pivot axis by means of contact surface.Therefore, cut off device arm is attached simply to be fixed to
The element of cylinder cover, rotatably to fix.
Ring includes radial opening, which extends through the thickness of the ring, so as to by lubricating fluid band to contact table
Face,
Cut off device arm includes the recess of the circumferential edge positioned at ring.
Advantageously, ring includes the recess of the opening for the thickness for extending through ring and the circumferential edge positioned at ring, described to open
Mouth and recess can rub to reduce between cut off device arm and pivotal axis by lubricating fluid band to the contact surface of cut off device arm
It wipes, which can result in the element heating of two contacts and lead to engine on the other hand undesirably on the one hand
Excessively use.
Advantageously, cut off device arm, which is installed into surround, keeps the axially free end of protuberance to be pivotally displaced, and the holding is grand
It rises and is fixed to cylinder cover rotatably to fix, so that being easier device assembly in the smaller space of cylinder cover.Every
Disconnected device arm is not associated with return mechanism, and return mechanism will cause actuation means to become more sophisticated.Keep protuberance preferably include by
At least one free end that the ring of cut off device arm surrounds.
Description of the drawings
By reading to the specific embodiment of the invention that is provided with non-limiting example and shown in the accompanying drawings
It is described in detail, it will be recognized that other feature and advantage, in the accompanying drawings：
- Fig. 1 is the cross section for indicating valve actuating apparatus according to the present invention.
- Fig. 2 is the schematic diagram from the cut off device arm according to the present invention from the point of view of the first visual angle.
Schematic diagrames of-the Fig. 3 from the cut off device arm from the point of view of the second visual angle opposite with the first visual angle.
- Fig. 4 is mounted in the profile view of the device in cylinder cover.
- Fig. 5 is the schematic diagram according to the present invention for being arranged in the end of the cut off device arm between cam and valve rod.
Specific implementation mode
In the following description, identical reference number refers to identical component or the portion with similar functions
Part.
As shown in Figure 1 and Figure 5, the cylinder cover 12 of Thermal Motor (not shown) is arranged in for activating the device 10 of valve
In chamber 11, valve is transferred to the moving in rotation for ensuring camshaft and the valve is made to generate the sliding consistent with its axis and is moved
Make, to open air pipeline or gas pipeline.
Camshaft 13 is installed in a known way, to be rotatably moved, and by actuated element such as chain and tooth
It takes turns (not shown) and is driven by the rotation of crank axle (not shown).The camshaft carries multiple cams 14, these cams are pacified
It dresses up and is rotatably fixed relative to the axis.
According to the diagram of Fig. 5, cut off device arm 20 is arranged between the head 30 of the valve rod 31 of cam 14 and valve 32, with ensure by
The moving in rotation of cam is changed into the translational movement of the valve rod 31 consistent with the axis of the valve rod.Cut off device arm 20 can surround pivot
Shaft Y is pivotally displaced, and pivotal axis Y is fixed to the wall elements of cylinder cover rotatably to fix.Cut off device arm is along basic
On be orthogonal to camshaft the axis 23a of axis be longitudinally extended, and the cut off device arm includes：First end, the first end
Portion surrounds the pivot axis；And second opposed end, when cut off device arm is mounted on its operating position, second opposite end
Portion is arranged between cam 14 and valve rod 31.In the rest part of this document, by the pivot axis with reference to cut off device arm 22, the pivot
Shaft axis is the axis for the cylindrical ring that can surround the pivotal axis Y fixed to cylinder cover.When cut off device arm is operated mounted on it
When position, the pivot axis 22 of cut off device arm is aligned with pivotal axis Y.
As shown in Figures 2 and 3, cut off device arm 20 includes actuator arm 23, which is extended through ring in first end 21a
And extended in opposed second ends 21b through contact head 24.The axis 23a of cut off device arm is aligned with the axis of actuator arm 23.
Once cut off device arm is mounted on its operating position in cylinder cover, the contact head 24 is the head for being arranged in cam 14 and valve rod 31
Between 30.
The contact head 24 includes the contact top surface 25 towards cam 14 and the opposite adjoining bottom surface towards valve rod 31
26。
Contact top surface 25 is formed, to keep substantially permanently connecing with cam 14 during the rotation displacement of the cam
It touches.
Top surface 25 is substantially in concave surface, it is, the top surface has the curvature for being directed toward bottom surface 26.According to fig. 2 in Fig. 3
The embodiment of offer, top surface 25 have the list consistent with the axis 22b of pivot axis 22 of cut off device arm 20 is arranged essentially parallel to
One curvature.The curvature of top surface 25 can allow between the top surface of the contact head of cam and cut off device arm substantially forever
Contact long.
As shown in figure 4, by preferred mode, top surface has the width consistent with the transverse axis for being parallel to pivot axis 22
Degree, the width of different size in cam.The width of top surface can be more than the width of cam, so as to ensure cam and cut off device arm it
Between contact the contact is reduced.The width of top surface is smaller than the width of cam, so that cut off device arm is more dynamically grasped
Make and so that cam more dynamically operates.In this way, although cam and partition may be caused by being generated during power operation
The vibration of the relative displacement consistent with transverse axis occurs between device arm, two elements, which will remain, to be in contact with each other.
During the rotation of cam 14, the contact between cam 14 and top surface 25 is moved on the surface of top surface.Therefore, must
It must reduce and rub between cam and cut off device arm as much as possible.Preferably, the top surface is by with low-friction coefficient
Sliding material covering.The material can be such as DLC (diamond-like-carbon) coating, and the coating has about in the dry state
The frictional behavior of 0.1 (between 0.8 and 1.8) and about 0.02 μm of roughness Ra.
Preferably, steel of the top surface by hardness more than or equal to 55HRC (rockwell hardness) is made.
Adjacent bottom surface 26 is formed, to be kept with the head 30 of valve rod 31 during valve rod is moved according to the axis translation of valve rod 24
Contact.
The contact head of cut off device arm includes the bottom surface towards convex valve rod, that is to say, that bottom surface 26, which has, is directed toward top surface 25
Curvature.
Bottom surface 26 have the first principal curvatures 27, first principal curvatures be directed toward top surface and be arranged essentially parallel to cut off device arm
Pivot axis 22 curvature axis 22a it is consistent.The curvature can allow between bottom surface 26 and the head 30 of valve rod substantially
Constant contact.Preferably, the radius 27a of bottom principal curvature of a surface 27 can essentially around actuator arm 23 axis 23a from described
The first longitudinal direction end 26a to opposed longitudinal ends 26b of bottom surface changes.The radius of curvature can be for example from first longitudinal direction end 26a
Minimum value increase, until curvature value be more than opposed longitudinal ends 26b.In this way, cam, which abuts against contact head, can generate symbol
Close the accurate slide of the required sliding profile of valve rod.Term " sliding profile " is intended to be understood as that the slide not
With the acceleration or deceleration stage.
Curvature axis 22a can also be changed while keeping parallel with pivot axis 22 by displacement.
The bottom surface of contact head has torsion 28, the torsion and the axis 23a for being arranged essentially parallel to actuator arm 23
Curvature axis 28a it is consistent.Therefore the curvature axis 28a can have deflecting angle with the axis 23a of actuator arm.
The radius of curvature of torsion can also be sent out according to transverse axis from the first lateral ends to the second relatively transverse end
Changing, as curvature axis can for example be occurred while keeping substantially parallel with the axis 23a of actuator arm by shifting
Variation.
The embodiment provided according to fig. 3, torsion have the curvature half around curvature axis 28a substantial constants
Diameter.Preferably, the radius of curvature of torsion is substantially greater than the radius of curvature of principal curvatures.
Around the first principal curvatures 27 of the axis 22a for the pivot axis 22 for being parallel to cut off device arm and around transverse to pivot
The association of the torsion 28 of the axis of axis 22 also leads to the curvature that there is the axis 23a around actuator arm to change for bottom surface 26.
Preferably, steel of the bottom surface 26 of contact head by hardness more than 55HRC is made.
The return spring of valve (not shown) driving stem on the direction of cut off device arm, and help to maintain the head of valve rod
30 contact with the adjoining bottom surface 26 of cut off device arm.Therefore between cam 14 and cut off device arm 20 and in cut off device arm and valve rod
Substantially permanent contact is established between 31 head 30.
Preferably, the surface of bottom surface 26 is also covered by the sliding material with low-friction coefficient, and the sliding material can be
DLC。
It does not load and is applied to cut off device arm 22, therefore its movement must be as smooth as possible, in cam 14 and valve rod 24
Between traffic load when do not generate other load.
Cut off device arm includes the ring 40 of the first end 21a positioned at actuator arm 23, which surrounds the axis with camshaft 20
Substantially parallel pivotal axis Y.The pivot axis is a part for the free end 50 for keeping protuberance 51.The internal diameter of ring 40 is basic
The upper outer diameter for being more than the pivotal axis Y for keeping protuberance 51.The holding protuberance includes such as holding member 52, and the holding member is by solid
Wall elements of the device fixed to cylinder cover are determined rotatably to fix.The fixing device is preferably fixing screws, this is fixed
Screw extends through the mounting hole 53 formed across the holding member and is introduced into the hole of cylinder cover.
Retaining ring 40 is preferably the cylinder with peripheral wall 41, and the peripheral wall has radial thickness.The ring is borrowed
Help contact surface 42b to surround pivotal axis Y.
According to fig. 2 and Fig. 3, retaining ring 40 include the radial opening 43 of the thickness for the peripheral wall 41 for extending through the ring.
The opening is opened in the free outer surface part of ring.The opening can be for example by the free outer surface part 42a of ring
Radial hole is formed, and the ring is not in the extension of the actuator arm of cut off device arm.The opening 43 allows lubricating fluid from ring 40
Inner contact surface 42b of the outside transmission until ring.
Retaining ring may also include the recess 44 at the circumferential edge 45 of ring.The recess also allows lubricating fluid to be brought towards
The inner contact surface 42b of ring.
As shown in Figure 5, cut off device arm is oriented that the moving in rotation of cam 14 is changed into against valve in the best way
The adjacent movement of the head 30 of bar 31, without securing the component to the head 30 of valve rod, to allow to reduce involved matter
It measures and improves the operation of valve and therefore improve the operation of engine.
Cut off device arm is preferably made of alloy in lightweight steel.
According to Fig. 5, the device for activating valve is arranged in the chamber 11 of the cylinder cover of Thermal Motor.Cut off device arm quilt
It is mounted to be pivotally displaced around pivotal axis Y, wall elements of the pivotal axis Y fixed to cylinder cover are described rotatably to fix
Pivotal axis Y is a part for the holding protuberance 51 of the wall elements fixed to cylinder cover.During power operation, cause camshaft
Rotation, and cam 14 be moved to by means of its top surface abut against cut off device arm 20 and the side of valve drive up it is described every
The contact head 24 of disconnected device arm.Therefore cause cut off device upper-arm circumference to be rotated around pivotal axis Y and allow will abut against load transmission to valve rod
Head.Chamber of the valve rod 31 towards cylinder is driven in sliding manner, to open gas pipeline.Cam 14 then release with every
The contact of disconnected device arm 20.Therefore the return spring of valve makes the contact head of the repulsion cut off device arm of valve rod 31 and repulsion in an opposite direction
Cam.The sliding profile (it is, mobile acceleration/deceleration) of valve rod is completely by the cause of the curvature around the bottom surface of cut off device arm
The Curvature varying of swing arm axis limits.
When cam 14, which is moved to, to be abutted with contact head, it is laterally negative that torsion allows the axis relative to valve rod 31 to generate
It carries, so that driving stem is towards the combustion chamber of cylinder；Therefore the lateral load can make valve rod generate rotation, and therefore valve is made to enclose
It rotates about the axis thereof.
In the chamber 11 of cylinder cover, mist of oil is formed by introducing oil with different supply ramp (not shown).It is oily because
This may pass through radial opening 43 or the recess 44 via ring 40, to lubricate the inner contact surface 42b of ring.Under its effect, every
Load is not generated on disconnected device arm 20.Contact between ring and pivot axis needs minimum lubrication, is not necessarily to any dedicated oil
Introduce pipeline.
On the top surface 25 for the contact head that oil can also be deposited on cut off device arm, and allow between cut off device arm and cam
Contact is lubricated.The coating of deposition also allows to rub between two elements of reduction.
The target of the present invention is achieved：Device for activating valve can be by easily fabricated and smaller quality partition
Device arm 20 is so that the contact between cam 14 and the head 30 of valve rod 31 is more reliable.The cut off device arm 20 is installed into can be by enclosing
It is pivotally displaced with operating clearance around pivotal axis Y, the pivotal axis Y is simply secured to cylinder cover.Cut off device arm 20 allows to control
The sliding of valve processed and valve is caused to rotate.
Certainly, the present invention is not limited only to by way of example in the embodiment of above-described this version；But it is also wrapped
Include its all variant.It therefore, can be in actuator arm and pivot axis in particular, without departing from the scope of the invention
Between addition reduce the device of friction, such as bearing.Longitudinal stop part can also be provided to replace the lateral wall elements of cylinder cover.
It is excessive axially displaced that the longitudinal direction stop part can prevent the actuator arm of cut off device arm from occurring, this it is excessive it is axially displaced can
It interrupts between cam and cut off device arm or the contact between cut off device arm and the head of valve rod.
Claims (10)
1. a kind of device (10) of the valve in cylinder cover by means of camshaft (14) to activate the Thermal Motor of motor vehicles
Cut off device arm (20), the cam shaft arrangement in the cylinder cover of the engine,
The cut off device arm includes：
Actuator arm (23), the actuator arm can be pivotally displaced around pivot axis (22),
And contact head (24), it is described that the contact head makes the first end extension of the arm and the contact head be arranged in
Between the cam (14) and valve (32) of camshaft,
The cut off device arm is characterized in that the contact head includes the bottom surface (26) towards the valve (32), the bottom surface base
It is in convex surface in sheet, includes the curvature (27) changed around the axis of the actuator arm (23).
2. cut off device arm (20) as described in claim 1, which is characterized in that the contact head of the cut off device arm it is described
Bottom surface, which has, surrounds the axis curvature of a curve substantially parallel with the pivot axis (22).
3. cut off device arm (20) as claimed in claim 2, which is characterized in that the contact head (24) of the cut off device arm
The bottom surface (26) includes the axis curvature of a curve essentially around the actuator arm (23).
4. cut off device arm (20) as claimed any one in claims 1 to 3, which is characterized in that the cut off device arm it is described
Contact head (24) includes top surface (25), and the top surface is opposite with the bottom surface (26) and the cam towards the camshaft
(14), the top surface is concave surface and has single curvature.
5. cut off device arm (20) as claimed in claim 5, which is characterized in that the curvature of the top surface with it is substantially parallel
It is consistent in the axis of the pivot axis (22, Y).
6. cut off device arm (20) as described in claim 4 or 5, which is characterized in that the contact head of the cut off device arm
(24) the top surface (25) is covered by the sliding material with low-friction coefficient.
7. the cut off device arm (20) as described in any one of claim 4 to 6, which is characterized in that the cut off device arm it is described
The top surface (25) of contact head (24) includes the width consistent with the pivot axis (22), described of different size in described convex
The width of the cam (14) of wheel shaft.
8. the cut off device arm (20) as described in any one of claim 1 to 7, which is characterized in that the cut off device arm includes position
Engagement ring (40) at the second opposed end of the actuator arm (23), the ring can be come by means of contact surface (42b)
Surround the pivot axis (22).
9. cut off device arm (22) as claimed in claim 8, which is characterized in that the ring (40) includes radial opening (43), institute
State the thickness that radial opening extends through the ring, so as to by lubricating fluid band to the contact surface (42b).
10. cut off device arm (22) as claimed in claim 8 or 9, which is characterized in that the cut off device arm includes being located at the ring
(40) recess (44) of circumferential edge.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1463377A FR3031137B1 (en) | 2014-12-29 | 2014-12-29 | DISTRIBUTION LINGUETS AXIALLY ADJUSTED BY AXIS JOINT AND CYLINDER HEAD |
| FR1559268 | 2015-09-30 | ||
| FR1559268A FR3031138B1 (en) | 2014-12-29 | 2015-09-30 | ENGINE DISTRIBUTION DEVICE LINGUET |
| PCT/FR2016/052452 WO2017055734A1 (en) | 2014-12-29 | 2016-09-27 | Breaker arm for an engine distribution device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108350766A true CN108350766A (en) | 2018-07-31 |
| CN108350766B CN108350766B (en) | 2021-02-09 |
Family
ID=52684509
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580074184.9A Active CN107208501B (en) | 2014-12-29 | 2015-12-10 | Timing finger follower stopped axially by hinge member and cylinder head |
| CN201680062764.0A Active CN108350766B (en) | 2014-12-29 | 2016-09-27 | Breaker arm for engine distribution device |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580074184.9A Active CN107208501B (en) | 2014-12-29 | 2015-12-10 | Timing finger follower stopped axially by hinge member and cylinder head |
Country Status (7)
| Country | Link |
|---|---|
| EP (2) | EP3240946B1 (en) |
| JP (2) | JP2018500503A (en) |
| KR (2) | KR20170102318A (en) |
| CN (2) | CN107208501B (en) |
| FR (2) | FR3031137B1 (en) |
| RU (1) | RU2698558C2 (en) |
| WO (2) | WO2016108002A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109307497A (en) * | 2018-10-30 | 2019-02-05 | 广西玉柴机器股份有限公司 | A kind of engine crankshaft flywheel moment and shaft automatic roundness measurement device |
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- 2016-09-27 KR KR1020187012417A patent/KR102294090B1/en active IP Right Grant
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109307497A (en) * | 2018-10-30 | 2019-02-05 | 广西玉柴机器股份有限公司 | A kind of engine crankshaft flywheel moment and shaft automatic roundness measurement device |
| CN109307497B (en) * | 2018-10-30 | 2023-10-24 | 广西玉柴机器股份有限公司 | Automatic measuring device for rotation moment of engine crankshaft and roundness of rotating shaft |
Also Published As
| Publication number | Publication date |
|---|---|
| FR3031137A1 (en) | 2016-07-01 |
| FR3031138B1 (en) | 2019-06-21 |
| JP2018500503A (en) | 2018-01-11 |
| RU2017127159A3 (en) | 2019-07-17 |
| CN108350766B (en) | 2021-02-09 |
| EP3240946A1 (en) | 2017-11-08 |
| CN107208501A (en) | 2017-09-26 |
| EP3356655A1 (en) | 2018-08-08 |
| WO2017055734A1 (en) | 2017-04-06 |
| FR3031138A1 (en) | 2016-07-01 |
| WO2016108002A1 (en) | 2016-07-07 |
| KR20170102318A (en) | 2017-09-08 |
| RU2017127159A (en) | 2019-01-31 |
| EP3240946B1 (en) | 2020-02-05 |
| RU2698558C2 (en) | 2019-08-28 |
| JP2018534461A (en) | 2018-11-22 |
| EP3356655B1 (en) | 2021-08-04 |
| KR20180063231A (en) | 2018-06-11 |
| CN107208501B (en) | 2020-10-13 |
| KR102294090B1 (en) | 2021-08-26 |
| FR3031137B1 (en) | 2016-12-23 |
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Effective date of registration: 20240306 Address after: Valladolid, Spain Patentee after: New H Power Transmission System Holdings Ltd. Country or region after: Spain Address before: Bologna-Biyangu, France Patentee before: RENAULT S.A.S. Country or region before: France |
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